github.com/marytts/marytts

I’ve used MaryTTS semi-recently. It’s older but works well enough for my cases. I have it running on a server (locally) and my endpoints make a call to it and playback the returned audio file.

On Android, I use SherpaTTS which has good voices, but I’m not aware of a desktop/Linux option. It mentions using voices from Coqui which you linked, so I would guess that would be the way to go for desktop.